Tank for a portable cleaning machine



FIG. 1 is a perspective view of a tank for a portable cleaning machine showing our new design;

FIG. 2 is an enlarged perspective view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a top side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a front view thereof; and,

FIG. 8 is a rear view thereof. 

The ornamental design for a tank for a portable cleaning machine, as shown and described. 